“Let There Be Light!” – my first show will be about light and weird science facts. My guest is Greg Gbur, an associate professor of Physics and Optical Science at the University of North Carolina at Charlotte, specializing in research on theoretical classical optics. Since August of 2007 he has blogged as “Dr. SkySkull” at Skulls in the Stars, where he covers optics, the history of physics, historical weird fiction, and the interconnection of these subjects. Greg also co-founded the history of science blog carnival The Giant’s Shoulders. He has over 60 peer-reviewed publications and is the author of the upcoming textbook, “Mathematical Methods for Optical Physics and Engineering”.

Once, when I was maybe ten years old, I asked my dad, “Why is the sky blue?”

A pretty reasonable question for a little ten-year-old scientist. But he wasn’t in the mood.

He said, “Go ask your mother.”

And I thought: Great, she knows.

I turned from my dad, and headed toward the kitchen, knowing I was one step closer to having my answer.

And as I rounded the corner, I was experiencing the thrill of the Scientific Method. I was following in the footsteps of Galileo and Isaac Newton.

And, to a certain degree, I was correct. I was, indeed, one step closer to my answer. Not the answer, but an answer.

There she stood. I took a deep breath, and asked her, “Mom, why is the sky blue?”

And I’ll never forget her response:

“Because I said so.”

At first, I was in awe of my mother. Later, I learned not to trust her in matters of science.

(The real reason the sky is blue has to do with light scattering by oxygen and nitrogen molecules. The Usenet Physics FAQ of UC Riverside has a good explanation – including the role Albert Einstein played in proving it was the air molecules themselves that were responsible and not particles of dust or droplets of water vapor suspended in the air)